Dusting off some notes for upcoming lectures on regional groundwater flow & was reminded of how much I liked this paper on the carbonates in Manitoba by Grasby & Betcher. We don't do enough work like this in Canada these days & there's so much left to map.
https://www.nrcresearchpress.com/doi/abs/10.1139/e02-021#.Xhtmb1NKh-U

Good to see an awareness campaign in full swing: Ontario Federation of Agriculture prioritizes well water testing in 2020 https://www.groundwatercanada.com/ontario-federation-of-agriculture-prioritizes-well-water-testing-in-2020/